Senior Full Stack Developer, Node, React

Job not on LinkedIn

🔥 15 hours ago

🇨🇴 Colombia – Remote

⏳ Contract/Temporary

🟠 Senior

🧑‍💻 Full-stack Engineer

👻 Ghost score 10%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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EX Squared

WebsiteLinkedInAll Job Openings

501 - 1000 employees

Founded 2000

💼 Consulting

🤖 Artificial Intelligence

🤝 B2B

Consulting • Artificial Intelligence • B2B

EX Squared is a digital product and experience consultancy that helps enterprises move AI and digital initiatives from ambition into production. Since 2001 the firm has delivered strategy, UX/UI and multi-channel digital experiences plus engineering and IT infrastructure work, and specializes in GenAI, machine learning, computer vision, and NLP. EX Squared is a certified Optimizely and Sitecore partner and focuses on building enterprise-scale digital products and advanced AI-driven solutions for large B2B clients.

📋 Description

• Architect and develop full-stack applications from the ground up using React and Node.js • Build scalable application logic and cloud infrastructure for digital products and agentic workflows • Design systems enabling autonomous agents to interact, make decisions, and execute tasks • Develop and maintain REST and GraphQL APIs • Build and integrate MCP-compatible REST and GraphQL APIs • Integrate third-party SaaS platforms and external services, including Microsoft Graph and social media APIs • Optimize website and application performance • Develop accessible interfaces compliant with WCAG 2.1 AA standards • Apply authentication, authorization, API key management, and access auditing throughout development • Implement functional and end-to-end automated tests using Jest and Cypress • Define service-level objectives and apply production observability practices, including logs, metrics, and distributed traces • Participate in technical research, solution design, and resolution of complex engineering challenges • Collaborate with developers, QA professionals, architects, and stakeholders across the development lifecycle • Create and maintain API documentation, interface contracts, and versioning standards

🎯 Requirements

• At least five years of professional experience working with modern development frameworks and languages • Strong hands-on experience with React and Node.js • Ability to develop full-stack applications from scratch and deploy the infrastructure required to host them • Experience with AWS and Docker • Familiarity with AWS services such as ECS Fargate, Aurora, OpenSearch, S3, EventBridge, SQS, Cognito, and Bedrock • Experience integrating third-party SaaS tools and external APIs • Experience developing accessible interfaces that comply with WCAG 2.1 AA standards • Familiarity with OAuth 2.0, OpenID Connect, API key management, and access audit trail patterns • Exposure to RBAC and ABAC access control models • Experience delivering applications with functional and automated tests using Jest and Cypress • Experience developing server-side rendered applications using Next.js or Nuxt.js • Experience with GraphQL and Apollo • Experience building or integrating MCP-compatible REST or GraphQL APIs • Understanding of API interface contracts, versioning, and consumer documentation • Familiarity with service-level objectives and production observability practices • Experience building or consuming agentic workflows • Advanced English communication skills • Ability to collaborate effectively with an international team • Hands-on experience implementing structured LLM outputs through function or tool calling • Familiarity with LLM evaluation approaches, including golden test sets, LLM-as-judge pipelines, and prompt regression testing • Ability to define measurable metrics for evaluating AI output quality • Previous experience with AWS Bedrock or similar generative AI platforms • Experience integrating CreatorIQ, Frame.io, Microsoft 365 Graph, or social media APIs • Strong ownership, initiative, problem-solving skills, and a collaborative, ego-free approach

🏖️ Benefits

• Competitive compensation in USD • Access to learning platforms and professional development opportunities • Flexible work environment • Collaborative and multicultural teams • Supportive, flexible, and people-focused environment • Continuous learning and open collaboration